Variant 3-99790999-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020351.4(COL8A1):c.317A>G(p.Lys106Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000018 in 1,611,314 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

COL8A1
NM_020351.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.12

Variant links:

Genes affected

COL8A1 (HGNC:2215): (collagen type VIII alpha 1 chain) This gene encodes one of the two alpha chains of type VIII collagen. The gene product is a short chain collagen and a major component of the basement membrane of the corneal endothelium. The type VIII collagen fibril can be either a homo- or a heterotrimer. Alternatively spliced transcript variants encoding the same protein have been observed. [provided by RefSeq, Dec 2011]

COL8A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.09241977).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL8A1	NM_020351.4 linkuse as main transcript	c.317A>G	p.Lys106Arg	missense_variant	3/4	ENST00000652472.1
COL8A1	NM_001850.5 linkuse as main transcript	c.317A>G	p.Lys106Arg	missense_variant	4/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL8A1	ENST00000652472.1 linkuse as main transcript	c.317A>G	p.Lys106Arg	missense_variant	3/4		NM_020351.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152278

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000440

AC:

AN:

250280

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

135298

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000443

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000158

AC:

AN:

1458918

Hom.:

Cov.:

AF XY:

0.00000965

AC XY:

AN XY:

725154

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152396

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74536

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000326

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 17, 2021

The c.317A>G (p.K106R) alteration is located in exon 4 (coding exon 1) of the COL8A1 gene. This alteration results from a A to G substitution at nucleotide position 317, causing the lysine (K) at amino acid position 106 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.064

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.26

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.064

T;T;T;T

Eigen

Benign

-0.024

Eigen_PC

Benign

0.18

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.81

T;.;T;T

M_CAP

Benign

0.024

MetaRNN

Benign

0.092

T;T;T;T

MetaSVM

Uncertain

-0.032

MutationTaster

Benign

0.52

N;N

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-2.6

D;N;N;.

REVEL

Benign

0.26

Sift

Pathogenic

0.0

D;D;D;.

Sift4G

Pathogenic

0.0

D;T;T;T

Polyphen

0.0030

.;B;B;.

Vest4

0.25, 0.25

MVP

0.93

MPC

0.18

ClinPred

0.17

GERP RS

5.9

Varity_R

0.079

gMVP

0.37

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over